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National Stock Number:
5305-01-194-9199
Federal Supply Class:
5305
National Item Identification Number:
011949199
Description:
SCREW,CLOSE TOLERANCE
Detail:
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
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Manufacturer Information:
| HT353P3-9 | 73197 | HI-SHEAR CORPORATION | | HT353P3-9 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | HT4058-3-9A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4058-3-9A | 17446 | HUCK INTERNATIONAL, INC | | HT4058-3-9A | 56878 | SPS TECHNOLOGIES, LLC | | HT4058-3-9A | 80539 | SPS TECHNOLOGIES, LLC | | ST3M794V3-9A | 76301 | THE BOEING COMPANY | | ST3M794V3-9A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4058-3-9A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4058-3-9A | 97928 | HUCK INTL INC | | ST3M794V3-9A | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | THREAD QUANTITY PER INCH | 32 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.380 INCHES MINIMUM AND | | 0.447 INCHES MAXIMUM | | FASTENER LENGTH | 0.952 INCHES MINIMUM AND | | 0.999 INCHES MAXIMUM | | MATERIAL | TITANIUM ALLOY OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4967 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | HEAD DIAMETER | 0.4625 INCHES MINIMUM AND | | 0.4672 INCHES MAXIMUM | | HEAD HEIGHT | 0.0800 INCHES MINIMUM AND | | 0.0820 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.552 INCHES MINIMUM AND | | 0.572 INCHES MAXIMUM | | GRIP DIAMETER | 0.1890 INCHES MINIMUM AND | | 0.1895 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS | | SPECIAL FEATURES | FURNISH WITH O'RING |
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